These are old classic mathematical problems. When you were in middle or high school.
These tests are more fun when you find yourself trying to remember the math you learned as a child.
Can you figure out the correct solution?
Which is the right answer?
Time to use your head. Set your time in 3 minutes and try to find the answer.
Now to the brainteaser – can you figure out the answer? Try to think back on the mathematical rules!
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Answer：
25
